The role of models TOK presentation

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Transcript of The role of models TOK presentation

Real world exampleIn middle schoolPerspective 1 Natural ScienceWhat is a model?Perspective 2Human ScienceModels and TOKLink back to RWEApplication to the world beyond RWEKnowledge questionTo what extent can we use model as a valid representation of the knowledge in real world?In high schoolEconomicsVersion 2.0The most basic vesionmoneymoneyinputgoods & servicesfirmshouseholdsConclusions=Natural GeographyMore abstractMore variablesMore unpredictableSense perceptionLanguageOne glance solves everythingThe power of metaphorWaterFlowImaginationIf you can't see then imagine...moneymoneygoods & servicesinputleakagetaxsavingexportinjectioninvestmentgovernment spendingimportCorrespondenceCoherencePragmaticTheoretical characteristicDifficulties in conducting experimentSignificanceEvaluation: Two groups of peopleStudentsEconomistsJust the gistAs profound as possibleSummaryHuman activities and personalities, which are the subject in human science, are too complex to be pinned down and studied A simplified version of realityThey are just what men think they are The wrongs are still valuableDefinitionRepresentation (physical object, schematic illustration or worded description) of phenomena, objects or complex processes.3. Some models, although simplified, are useful.

4. A"wrong" model can be the portal to another better model.1. Models ≠ knowledge in reality

2. Models can be influenced by biasThe GlobeStudents studying what the Earth is like as the teacher of the Natural Science showing them the Globe.Allow Visualization:

how the earth looks, how the continents are placed, the size of the oceans, etc. (color of the continents and ocean)Sense perceptionLanguageThe names of countries, continents and seas, which help in identification. Natural Geography ClassExampleCorrespondenceCoherencePragmaticEvaluation: 2 groups of peopleStudentsScientistsUseful to understand knowledgeNot true;Not so useful to do investigationSummaryEach model is a specific version of the real world and serves its own purpose. Generally the more detailed the model, the closer it is to realityTwo StatementsSuppose its 10:01 now

EvaluationThe test of utility makes the first model better than the other one even though it is not true.Limitations： doesn't necessarily apply to all situationsThose who use modelsThe realization of the difference between models and realityMake proper use of different different modelsThose who make models Be aware of personal biaslimitation of simplification

The MONIAC machineLimitationsCorrespondence testCoherence testSimplified, inaccurate, but still correspondentSometimes we can not know the truth, thus can not see whether the model is correspondent with it or notPragmatic testUtilityvalidity＞The model is based on Keynesian The maker was a supporter of KeynesianConfirmation biasIncoherent with the Monetarists' beliefCoherent test1. It is 10:00 a.m.2. It is between 3:00 a.m. and 3:00 p.m.LimitationNot comprehensive enough...and others (will be further discussed in 3 Tests of Truth later)